People had models of understanding long before alphabets. Alphabets allow writting which allows records and transmission. Chinesse had no alphabet until Pinyin (1950) and uses concept symbols.
Although Chinesse revolutionaries commented in the First World War how the European could achieve literacy using alphabets whereas it was constrained in China by the complexity of the symbols (simplied in the 1950s)
Customer how many can I buy. Unlimited Madam. Employee how many days holiday can I have. …
So LLM need reality and that is why RAG is in the news although there was a MS paper a few years ago about using cognative model to keep Deep Learning work in reality.